Answer: Option B. 50 A
In a step down transformer, turns ratio is 5:1, the primary current is 10 A and the secondary current is 50 A.
Solution
The transformer works on the principle of MMF balance.
I1N1=I2N2
I1/I2=N1/N2
Step down transformer turns ratio is 5.
N1/N2=5
The primary current (I1) is 10 A. Secondary current (I2) is
I2=I1×N1/N2=10×5=50 A.
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